body {
    margin: 0;
}
.wrapper {
    .drawBox {
        width: 80vw;
        height: 80vw;
        margin: 50px auto auto auto;
        overflow: hidden;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
    }
    .head {
        height: 40px;
        line-height: 40px;
        background: #1988F4;
        text-align: center;
        color: white;
    }
    ul {
        padding: 0;
    }
}   

